Electric-field-induced optical hysteresis in single-layer WSe2

Zheng Sun; Jonathan Beaumariage; Ke Xu; Jierui Liang; Shaocong Hou; Stephen R. Forrest; Susan K. Fullerton-Shirey; David W. Snoke

doi:10.1063/1.5123514

Electric-field-induced optical hysteresis in single-layer WSe₂

Zheng Sun, Jonathan Beaumariage, Ke Xu, Jierui Liang, Shaocong Hou, Stephen R. Forrest, Susan K. Fullerton-Shirey, David W. Snoke

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Abstract

We demonstrate that the exciton energy of a monolayer of tungsten diselenide on an SiO₂/Si substrate can be tuned by an applied in-plane electric field for two samples with different dielectric capping materials. The exciton energy can be either red- or blue-shifted by up to 20 meV based on the polarity of the applied electric field. We argue that a piezoelectric effect creates a large internal electric field, which is either partially aligned or partially antialigned with the external electric field. Additionally, optical hysteresis is observed on cycling of the external electric field due to trapped charges.

Original language	English
Article number	161103
Journal	Applied Physics Letters
Volume	115
Issue number	16
DOIs	https://doi.org/10.1063/1.5123514
State	Published - 14 Oct 2019
Externally published	Yes

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10.1063/1.5123514

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title = "Electric-field-induced optical hysteresis in single-layer WSe2",

abstract = "We demonstrate that the exciton energy of a monolayer of tungsten diselenide on an SiO2/Si substrate can be tuned by an applied in-plane electric field for two samples with different dielectric capping materials. The exciton energy can be either red- or blue-shifted by up to 20 meV based on the polarity of the applied electric field. We argue that a piezoelectric effect creates a large internal electric field, which is either partially aligned or partially antialigned with the external electric field. Additionally, optical hysteresis is observed on cycling of the external electric field due to trapped charges.",

author = "Zheng Sun and Jonathan Beaumariage and Ke Xu and Jierui Liang and Shaocong Hou and Forrest, \{Stephen R.\} and Fullerton-Shirey, \{Susan K.\} and Snoke, \{David W.\}",

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T1 - Electric-field-induced optical hysteresis in single-layer WSe2

AU - Sun, Zheng

AU - Beaumariage, Jonathan

AU - Xu, Ke

AU - Liang, Jierui

AU - Hou, Shaocong

AU - Forrest, Stephen R.

AU - Fullerton-Shirey, Susan K.

AU - Snoke, David W.

PY - 2019/10/14

Y1 - 2019/10/14

N2 - We demonstrate that the exciton energy of a monolayer of tungsten diselenide on an SiO2/Si substrate can be tuned by an applied in-plane electric field for two samples with different dielectric capping materials. The exciton energy can be either red- or blue-shifted by up to 20 meV based on the polarity of the applied electric field. We argue that a piezoelectric effect creates a large internal electric field, which is either partially aligned or partially antialigned with the external electric field. Additionally, optical hysteresis is observed on cycling of the external electric field due to trapped charges.

AB - We demonstrate that the exciton energy of a monolayer of tungsten diselenide on an SiO2/Si substrate can be tuned by an applied in-plane electric field for two samples with different dielectric capping materials. The exciton energy can be either red- or blue-shifted by up to 20 meV based on the polarity of the applied electric field. We argue that a piezoelectric effect creates a large internal electric field, which is either partially aligned or partially antialigned with the external electric field. Additionally, optical hysteresis is observed on cycling of the external electric field due to trapped charges.

UR - https://www.scopus.com/pages/publications/85073601377

U2 - 10.1063/1.5123514

DO - 10.1063/1.5123514

M3 - 文章

AN - SCOPUS:85073601377

SN - 0003-6951

VL - 115

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 16

M1 - 161103

ER -

Electric-field-induced optical hysteresis in single-layer WSe₂

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